(for PR #28410)

2025-08-28 15:42.26: New job: build volgo-git-backend.0.0.21, using opam 2.3
                              from https://github.com/ocaml/opam-repository.git#refs/pull/28410/head (7c55ff983df5d54fa7f951afc3269cad97244848)
                              on debian-12-ocaml-4.10/amd64

To reproduce locally:

cd $(mktemp -d)
git clone --recursive "https://github.com/ocaml/opam-repository.git" && cd "opam-repository" && git fetch origin "refs/pull/28410/head" && git reset --hard 7c55ff98
git fetch origin master
git merge --no-edit f2cd184cfc6f3b25d3bda0873beb3e8b254806ec
cat > ../Dockerfile <<'END-OF-DOCKERFILE'
FROM ocaml/opam:debian-12-ocaml-4.10@sha256:4e608abb3d6f52e21cc5628583fccf649326c85eb9375f8fd7f2a88ecdd9756e
USER 1000:1000
WORKDIR /home/opam
RUN sudo ln -f /usr/bin/opam-2.3 /usr/bin/opam
RUN opam init --reinit -ni
RUN opam option solver=builtin-0install && opam config report
ENV OPAMDOWNLOADJOBS="1"
ENV OPAMERRLOGLEN="0"
ENV OPAMPRECISETRACKING="1"
ENV CI="true"
ENV OPAM_REPO_CI="true"
RUN rm -rf opam-repository/
COPY --chown=1000:1000 . opam-repository/
RUN opam repository set-url --strict default opam-repository/
RUN opam update --depexts || true
RUN opam pin add -k version -yn volgo-git-backend.0.0.21 0.0.21
RUN opam reinstall volgo-git-backend.0.0.21; \
    res=$?; \
    test "$res" != 31 && exit "$res"; \
    export OPAMCLI=2.0; \
    build_dir=$(opam var prefix)/.opam-switch/build; \
    failed=$(ls "$build_dir"); \
    partial_fails=""; \
    for pkg in $failed; do \
    if opam show -f x-ci-accept-failures: "$pkg" | grep -qF "\"debian-12\""; then \
    echo "A package failed and has been disabled for CI using the 'x-ci-accept-failures' field."; \
    fi; \
    test "$pkg" != 'volgo-git-backend.0.0.21' && partial_fails="$partial_fails $pkg"; \
    done; \
    test "${partial_fails}" != "" && echo "opam-repo-ci detected dependencies failing: ${partial_fails}"; \
    exit 1

END-OF-DOCKERFILE
docker build -f ../Dockerfile .

2025-08-28 15:42.26: Using cache hint "ocaml/opam:debian-12-ocaml-4.10@sha256:4e608abb3d6f52e21cc5628583fccf649326c85eb9375f8fd7f2a88ecdd9756e-volgo-git-backend.0.0.21-7c55ff983df5d54fa7f951afc3269cad97244848"
2025-08-28 15:42.26: Using OBuilder spec:
((from ocaml/opam:debian-12-ocaml-4.10@sha256:4e608abb3d6f52e21cc5628583fccf649326c85eb9375f8fd7f2a88ecdd9756e)
 (user (uid 1000) (gid 1000))
 (workdir /home/opam)
 (run (shell "sudo ln -f /usr/bin/opam-2.3 /usr/bin/opam"))
 (run (network host)
      (shell "opam init --reinit --config .opamrc-sandbox -ni"))
 (run (shell "opam option solver=builtin-0install && opam config report"))
 (env OPAMDOWNLOADJOBS 1)
 (env OPAMERRLOGLEN 0)
 (env OPAMPRECISETRACKING 1)
 (env CI true)
 (env OPAM_REPO_CI true)
 (run (shell "rm -rf opam-repository/"))
 (copy (src .) (dst opam-repository/))
 (run (shell "opam repository set-url --strict default opam-repository/"))
 (run (network host)
      (shell "opam update --depexts || true"))
 (run (shell "opam pin add -k version -yn volgo-git-backend.0.0.21 0.0.21"))
 (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
      (network host)
      (shell  "opam reinstall volgo-git-backend.0.0.21;\
             \n        res=$?;\
             \n        test \"$res\" != 31 && exit \"$res\";\
             \n        export OPAMCLI=2.0;\
             \n        build_dir=$(opam var prefix)/.opam-switch/build;\
             \n        failed=$(ls \"$build_dir\");\
             \n        partial_fails=\"\";\
             \n        for pkg in $failed; do\
             \n          if opam show -f x-ci-accept-failures: \"$pkg\" | grep -qF \"\\\"debian-12\\\"\"; then\
             \n            echo \"A package failed and has been disabled for CI using the 'x-ci-accept-failures' field.\";\
             \n          fi;\
             \n          test \"$pkg\" != 'volgo-git-backend.0.0.21' && partial_fails=\"$partial_fails $pkg\";\
             \n        done;\
             \n        test \"${partial_fails}\" != \"\" && echo \"opam-repo-ci detected dependencies failing: ${partial_fails}\";\
             \n        exit 1"))
)

2025-08-28 15:42.26: Waiting for resource in pool OCluster
2025-08-28 15:42.30: Waiting for worker…
2025-08-28 15:42.30: Got resource from pool OCluster
Building on toxis.caelum.ci.dev
All commits already cached
HEAD is now at f2cd184cfc Merge pull request #28399 from filipeom/opam-publish-smtml.0.10.0
Updating f2cd184cfc..7c55ff983d
Fast-forward
Auto packing the repository in the background for optimum performance.
See "git help gc" for manual housekeeping.
warning: The last gc run reported the following. Please correct the root cause
and remove .git/gc.log
Automatic cleanup will not be performed until the file is removed.

warning: There are too many unreachable loose objects; run 'git prune' to remove them.

 packages/volgo-base/volgo-base.0.0.21/opam         | 73 ++++++++++++++++++++++
 .../volgo-git-backend.0.0.21/opam                  | 61 ++++++++++++++++++
 packages/volgo-git-eio/volgo-git-eio.0.0.21/opam   | 62 ++++++++++++++++++
 packages/volgo-git-unix/volgo-git-unix.0.0.21/opam | 62 ++++++++++++++++++
 .../volgo-hg-backend/volgo-hg-backend.0.0.21/opam  | 61 ++++++++++++++++++
 packages/volgo-hg-eio/volgo-hg-eio.0.0.21/opam     | 63 +++++++++++++++++++
 packages/volgo-hg-unix/volgo-hg-unix.0.0.21/opam   | 62 ++++++++++++++++++
 packages/volgo-vcs/volgo-vcs.0.0.21/opam           | 68 ++++++++++++++++++++
 packages/volgo/volgo.0.0.21/opam                   | 58 +++++++++++++++++
 9 files changed, 570 insertions(+)
 create mode 100644 packages/volgo-base/volgo-base.0.0.21/opam
 create mode 100644 packages/volgo-git-backend/volgo-git-backend.0.0.21/opam
 create mode 100644 packages/volgo-git-eio/volgo-git-eio.0.0.21/opam
 create mode 100644 packages/volgo-git-unix/volgo-git-unix.0.0.21/opam
 create mode 100644 packages/volgo-hg-backend/volgo-hg-backend.0.0.21/opam
 create mode 100644 packages/volgo-hg-eio/volgo-hg-eio.0.0.21/opam
 create mode 100644 packages/volgo-hg-unix/volgo-hg-unix.0.0.21/opam
 create mode 100644 packages/volgo-vcs/volgo-vcs.0.0.21/opam
 create mode 100644 packages/volgo/volgo.0.0.21/opam

(from ocaml/opam:debian-12-ocaml-4.10@sha256:4e608abb3d6f52e21cc5628583fccf649326c85eb9375f8fd7f2a88ecdd9756e)
2025-08-28 15:43.11 ---> saved as "aeaf57a0808a84b5942785a06f5a2983d5c77cfe1a00098ff75cfa80cf937da4"

/: (user (uid 1000) (gid 1000))

/: (workdir /home/opam)

/home/opam: (run (shell "sudo ln -f /usr/bin/opam-2.3 /usr/bin/opam"))
2025-08-28 15:43.11 ---> saved as "191c9e0337f85a09b8101752c31ecac1678ecb553ef64ce148a143b57ff42884"

/home/opam: (run (network host)
                 (shell "opam init --reinit --config .opamrc-sandbox -ni"))
Configuring from /home/opam/.opamrc-sandbox, then /home/opam/.opamrc, and finally from built-in defaults.
Checking for available remotes: rsync and local, git.
  - you won't be able to use mercurial repositories unless you install the hg command on your system.
  - you won't be able to use darcs repositories unless you install the darcs command on your system.

This development version of opam requires an update to the layout of /home/opam/.opam from version 2.0 to version 2.2, which can't be reverted.
You may want to back it up before going further.

Continue? [y/n] y
Format upgrade done.

<><> Updating repositories ><><><><><><><><><><><><><><><><><><><><><><><><><><>
[default] Initialised
2025-08-28 15:43.37 ---> saved as "ac0c45a0ac34179b35552496a7aacedc6886878f77162f5c3d352ffe6d27a5b1"

/home/opam: (run (shell "opam option solver=builtin-0install && opam config report"))
Set to 'builtin-0install' the field solver in global configuration
# opam config report
# opam-version         2.3.0 (35acd0c5abc5e66cdbd5be16ba77aa6c33a4c724)
# self-upgrade         no
# system               arch=x86_64 os=linux os-distribution=debian os-version=12
# solver               builtin-0install
# install-criteria     -changed,-count[avoid-version,solution]
# upgrade-criteria     -count[avoid-version,solution]
# jobs                 71
# repositories         1 (version-controlled)
# pinned               1 (version)
# current-switch       4.10
# invariant            ["ocaml-base-compiler" {= "4.10.2"}]
# compiler-packages    ocaml-base-compiler.4.10.2
# ocaml:native         true
# ocaml:native-tools   true
# ocaml:native-dynlink true
# ocaml:stubsdir       /home/opam/.opam/4.10/lib/ocaml/stublibs:/home/opam/.opam/4.10/lib/ocaml
# ocaml:preinstalled   false
# ocaml:compiler       4.10.2
2025-08-28 15:43.38 ---> saved as "c32b62617213de252dc6202dd98a37aea6a7ae915f9c0067eb43a5272400ec1c"

/home/opam: (env OPAMDOWNLOADJOBS 1)

/home/opam: (env OPAMERRLOGLEN 0)

/home/opam: (env OPAMPRECISETRACKING 1)

/home/opam: (env CI true)

/home/opam: (env OPAM_REPO_CI true)

/home/opam: (run (shell "rm -rf opam-repository/"))
2025-08-28 15:43.50 ---> saved as "7564415e31f091f644ed1c1261198f598008ce0c9ec486e9c828c15831bacbb7"

/home/opam: (copy (src .) (dst opam-repository/))
2025-08-28 15:43.58 ---> saved as "8adb97ef424885af19b450fc0e79d533fb4d9601e8666ee389cf25f8cf092f09"

/home/opam: (run (shell "opam repository set-url --strict default opam-repository/"))
[default] Initialised
2025-08-28 15:44.18 ---> saved as "f5d6782803b8a95ce79fc4ca944f39b0c0fb57006e821348c2af4a129c9a5363"

/home/opam: (run (network host)
                 (shell "opam update --depexts || true"))
+ /usr/bin/sudo "apt-get" "update"
- Hit:1 http://deb.debian.org/debian bookworm InRelease
- Get:2 http://deb.debian.org/debian bookworm-updates InRelease [55.4 kB]
- Get:3 http://deb.debian.org/debian-security bookworm-security InRelease [48.0 kB]
- Get:4 http://deb.debian.org/debian-security bookworm-security/main amd64 Packages [277 kB]
- Fetched 380 kB in 0s (1350 kB/s)
- Reading package lists...
2025-08-28 15:44.19 ---> saved as "820388b024ebb67ce15ccc88924f84c94a30dfd4d7b688f9482793cc4dca8865"

/home/opam: (run (shell "opam pin add -k version -yn volgo-git-backend.0.0.21 0.0.21"))
volgo-git-backend is now pinned to version 0.0.21
2025-08-28 15:44.19 ---> saved as "f019ce986f78b9ceb54ba92bfe55b63b2a8127d8c3d789e807183dfe7485cafc"

/home/opam: (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
                 (network host)
                 (shell  "opam reinstall volgo-git-backend.0.0.21;\
                        \n        res=$?;\
                        \n        test \"$res\" != 31 && exit \"$res\";\
                        \n        export OPAMCLI=2.0;\
                        \n        build_dir=$(opam var prefix)/.opam-switch/build;\
                        \n        failed=$(ls \"$build_dir\");\
                        \n        partial_fails=\"\";\
                        \n        for pkg in $failed; do\
                        \n          if opam show -f x-ci-accept-failures: \"$pkg\" | grep -qF \"\\\"debian-12\\\"\"; then\
                        \n            echo \"A package failed and has been disabled for CI using the 'x-ci-accept-failures' field.\";\
                        \n          fi;\
                        \n          test \"$pkg\" != 'volgo-git-backend.0.0.21' && partial_fails=\"$partial_fails $pkg\";\
                        \n        done;\
                        \n        test \"${partial_fails}\" != \"\" && echo \"opam-repo-ci detected dependencies failing: ${partial_fails}\";\
                        \n        exit 1"))
volgo-git-backend.0.0.21 is not installed. Install it? [y/n] y
  * Incompatible packages:
    - (invariant) -> ocaml-base-compiler = 4.10.2
    - volgo-git-backend >= 0.0.21 -> ocaml >= 4.14 -> ocaml-variants >= 4.14.0~
    You can temporarily relax the switch invariant with `--update-invariant'
  * Missing dependency:
    - volgo-git-backend >= 0.0.21 -> ocaml >= 4.14 -> ocaml-variants >= 4.14.0~ -> system-msvc
    unmet availability conditions: 'os = "win32"'

No solution found, exiting
"/usr/bin/env" "bash" "-c" "opam reinstall volgo-git-backend.0.0.21;
        res=$?;
        test "$res" != 31 && exit "$res";
        export OPAMCLI=2.0;
        build_dir=$(opam var prefix)/.opam-switch/build;
        failed=$(ls "$build_dir");
        partial_fails="";
        for pkg in $failed; do
          if opam show -f x-ci-accept-failures: "$pkg" | grep -qF "\"debian-12\""; then
            echo "A package failed and has been disabled for CI using the 'x-ci-accept-failures' field.";
          fi;
          test "$pkg" != 'volgo-git-backend.0.0.21' && partial_fails="$partial_fails $pkg";
        done;
        test "${partial_fails}" != "" && echo "opam-repo-ci detected dependencies failing: ${partial_fails}";
        exit 1" failed with exit status 20
2025-08-28 15:44.41: Job failed: Failed: Build failed
2025-08-28 15:44.41: Log analysis:
2025-08-28 15:44.41: >>> 
No solution found, exiting
 (score = 100)
2025-08-28 15:44.41: [SKIP] Package not available